ADSORPTION OF CHROMIUM (III) FROM AQUEOUS SOLUTION BY MANGANESE FERRITE NANOPARTICLES

Abstract

In the present paper, nanosized manganese ferrite material is synthesized
by the hydrothermal method at temperatures of 190°C in 12 hours. The size and
microstructure of MnFe2O4 were analyzed based on X-ray diffraction (XRD),
scanning electron microscopy (SEM). The nitrogen adsorption-desorption was
used for determination of surface area (Brunauer - Emmett - Teller (BET)) and
porosity of the fabricated material. The adsorption behavior of Cr (III) using a
new magnetic adsorbent is investigated. The adsorption characteristic and Cr (III)
removal efficiency of the adsorbent have been determined by investigating the
influence of operating variables such as dosage of manganese ferrite. The
maximum Cr (III) sorption capacity was found to be 22.371mg/g and obtained
using 0.08g/100mL MnFe2O4 when pH equals 5, a temperature of 25°C, and
contact time as 24 hours. The Langmuir, Freundlich and Dubinin - Radushkevich
models were used to fit the experimental data and these showed good
correlations.